Connecting to Azure Data Lake Gen2

My issue very similar to issue described in article, but solution did not working for me:
https://nishantrana.me/2020/09/07/error-access-to-the-resource-is-forbidden-while-trying-to-connect-to-azure-data-lake-storage-gen2-using-power-bi-desktop/

I've added azure free trial user, created storage account and folders+files on Azure Data Lake Gen2.  My azure user has 3 roles:
Owner
Storage Blob Data Owner
Storage Blob Data Reader

The same user has PowerBI PRO subscription, but when I'm trying to "Add data" -> "Azure Data Lake Gen2"

URL: https://mystorageuser.file.core.windows.net/folder1

I'm receiving error:
Unable to connect.

Details: "Access to the resource is forbidden."

Same story at PowerBI online, Azure portal -> Azure connection (preview)

Error Details
Access denied
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